JPS6015647Y2 - Holding device for circular workpieces - Google Patents

Description

[Detailed description of the invention] This invention relates to a holding device for an annular workpiece, and more specifically, to an improvement of a holding device that holds an annular workpiece (an annular barrel-polished workpiece) in a barrel tank of a barrel polishing device. be.

Barrel polishing of a workpiece (object to be barrel-polished) can be roughly divided into two types: a type in which the workpiece is processed while being restrained in a barrel tank of a barrel polishing device, and a type in which the workpiece is polished without being restrained.

Among these, the conventional work holding device of the above-mentioned type that performs barrel polishing while restraining the work has the following drawbacks.

That is, (1) it is necessary to securely fix the workpiece at a desired position within the barrel tank, which requires an expensive and large-scale holding device.

(2) For workpieces that require barrel polishing over the entire surface of the workpiece, the holding part of the holding device must be immersed in the media (abrasive material) together with the held workpiece, and as a result, the sliding part of the holding part Not only will the durability of the holding part be extremely reduced due to the infiltration of media scum and coolant into the workpiece, etc., but the work may also be held with media scum caught between the claws, etc. of the holding part and the workpiece. , there is a risk that the workpiece will separate from the holding part during machining.

(3) If the held portion of the workpiece has a spherical shape, the holding device becomes expensive because the claws and the like of the holding device must also be formed in a shape opposite to the spherical surface.

(4) Since barrel polishing is performed with the workpiece firmly fixed, the workpiece is susceptible to uneven machining, and in order to prevent this uneven machining, complicated and expensive equipment such as a workpiece rotation mechanism is required.

Therefore, the purpose of this invention was to solve each of the problems mentioned above,
To provide an excellent holding device for an annular workpiece capable of accurately holding a workpiece, especially an annularly formed workpiece, and effectively barrel-polishing the workpiece with a simple structure holding device having few movable parts.

The feature of this invention is that it has an attachment part for the barrel polishing device on the upper part, and a part for attaching the annular workpiece in the lower part.The attachment part for the annular workpiece is formed in a closed loop shape, and By providing an opening for attaching and detaching a workpiece, and configuring this opening to be able to open and close elastically, the cost of the holding device can be reduced and reliability can be improved.
The object is to prevent uneven machining as much as possible during barrel polishing of the workpiece.

Hereinafter, this invention will be explained in detail by way of examples with reference to the drawings.

1 to 5 are explanatory front views of annular workpiece holding devices according to embodiments of this invention, respectively.

In the figure, E□ to E4 are respective holding devices for annular workpieces according to the embodiments of this invention, which have a mounting portion 1 for attaching the barrel polishing device G on the upper side and a mounting portion 2 for the annular workpiece a on the lower side. The attachment part 2 of the annular workpiece a is formed in a closed loop shape and has an opening 3 for attaching and detaching the workpiece in the upper part thereof, and is configured so that the opening 3 can be elastically opened and closed. There is.

Further, this structure will be specifically explained using each embodiment with reference to the drawings.

An annular workpiece holding device E1, which is an embodiment of this invention shown in FIGS. 1 and 2, is formed by bending a steel round bar into an abbreviated shape when viewed from the front, The upper part of the side is the attachment part 1 to the barrel polishing device G, and the lower bent part is the attachment part 2 for the annular workpiece a.

A workpiece presser rod 4 that makes the attachment section 2 into a closed loop shape is rotatably attached to the intermediate portion of the long leg side forming the attachment section 1 with a pin 5, and the outer end of this workpiece presser rod 4 A leaf spring 6 is installed between the part 4a and the mounting part 1, so that the inner end 4b of the work holding rod 4 can be constantly pressed against the lower surface of the stopper 7 attached to the free end 2a of the mounting part 2. It is.

Therefore, as shown in FIG. 2, when the workpiece presser bar 4 is rotated counterclockwise against the elastic force of the leaf spring 6, the inner end 4b of the workpiece presser bar 4 and the free end of the mounting portion 2 are rotated. 2a, and the annular workpiece a can be inserted into or taken out from the mounting section 2 through this opening 3.

Note that 8 in the figure is a work stopper, which prevents the annular work a from deviating from the mounting portion 2 during the barrel polishing process.

Next, an annular workpiece holding device E2 consisting of a second embodiment of this invention shown in FIG. 3 is similar to the first embodiment described above.
A steel round bar is bent into an oval shape when viewed from the front, and an attachment part 1 for attaching to a barrel polishing device G is formed on the upper part of the long leg side, and the lower bent part is used as an attachment part 2 for an annular workpiece a.

A plate spring 41 is attached to the middle part of the long leg side in place of the work holding bar 4 of the first embodiment described above, and the tip end 41a of this plate spring 41 is connected to the free end of the mounting part 2. It is constantly pressed against the lower surface of the stopper 7 attached to the stopper 2a.

Therefore, when the distal end side 41a of the leaf spring 41 is pushed down against its elastic force, an opening 3 is formed between the distal end side 41a and the free end 2a of the attachment part 2, as shown by the dashed line. The annular workpiece a can be inserted into or taken out from the mounting section 2 through this opening 3.

As described above, the annular workpiece holding device E2 of this embodiment has a structure without sliding parts, so that the depth of the annular workpiece a can be set freely within the media, and the reliability as a holding device is high. .

Continuing on, an annular workpiece holding device E3 consisting of a third embodiment of this invention shown in FIG. A mounting portion 1 for attaching to the barrel polishing device G is formed on the upper side, and
The lower bent portion is used as the mounting portion for the annular workpiece a.

In the case of this embodiment, the above-mentioned first embodiment and second embodiment
As in the embodiment, instead of providing the work holding bar 4 and the leaf spring 41 to make the attachment part 2 into a closed loop shape, the free end 2a of the attachment part 2 is made so that its tip abuts the long leg side as shown in the figure. By bending, the mounting part 2 is made into a closed loop shape, and a spring part 42 is formed on the lower side of the mounting part 2 to impart elastic force to the closed loop-shaped mounting part 2, and the tip of the free end 2a is made into a long leg. It is designed so that it can be pressed against the side at all times.

Therefore, when the free end 2a of the device section 2 is pulled counterclockwise against its elastic force, the free end 2a is pulled as shown by the dashed line.
An opening 3 can be formed between the tip and the long leg side, and the annular workpiece a can be inserted into the device section 2 or taken out from the mounting section 2 through this opening 3.

In the case of this embodiment described above, in addition to the effect of having a structure in which there is no sliding part in the holding device as in the second embodiment described above, when opening the device section 2 having a closed loop structure, the device section 2
All you have to do is apply a counterclockwise force to the free end 2a of
A large moment can be applied to the spring portion 42 with a small force, and the opening 8 can be formed extremely easily.

Furthermore, an annular workpiece holding device E consisting of a fourth embodiment of this invention shown in FIG. 5 is approximately the same as the third embodiment described above.
Although a detailed structural explanation will be omitted here, in the case of this embodiment, when forming the device part 2 of the annular workpiece a into a closed loop shape, as shown in the figure,
It is formed by bending the lower part of a steel round bar into a ring shape, and has a simple structure and produces the same effects as the third embodiment described above.

Next, an embodiment of a barrel polishing device G for carrying out barrel polishing by attaching the annular work holding device of this invention that holds an annular work a will be explained with reference to FIG. 6, and its structure and operation. do.

As shown in the figure, the barrel polishing device G in this embodiment includes a barrel tank 30 rotatably arranged on the top surface of a base 10 by a drive source 20, and a barrel polishing device G standing on the top surface of the base 10 facing the barrel tank 30. It is composed of a mounting device 40 for the present annular workpiece holding device E provided therein.

To further explain this structure, the barrel tank 30 has a rotating shaft 3 mounted on a bearing device 31 provided on the upper surface of the base 10.
It is rotatably attached via 2.

The drive source 20 is constructed by attaching an electric motor 22 to a ball 21 erected on the upper surface of the base 10, and a pulley 24 attached to a drive shaft 23 of the electric motor 22 and the barrel tank 30. A pulley 33 attached to a rotating shaft 32 of the barrel tank 30 is connected via a belt 25 and the electric motor 22 is driven.
can be rotated at the required rotation speed.

The mounting device 40 includes a slide par 41 erected on the upper surface of the base 10, a horizontal beam 43 attached to the slide par 41 so as to be movable up and down via a slide guide 42 and an actuator 45, and a horizontal beam 43 attached to the horizontal beam 43. It consists of an attachment rotation device 44 for the attached annular workpiece holding device E.

This mounting rotation device 44 is connected to an electric motor 4 mounted on the upper surface of the horizontal beam 43 via a ball 44a.
4b, and a chuck 44c rotatably provided at the free end of the horizontal beam 43.

Therefore, the chuck 44c is provided with the main annular workpiece holding device E.
When installing the annular workpiece a, operate the actuator 45 described above to raise the horizontal beam 43 sufficiently along the slide par 41, and then attach the annular workpiece holding device E1 that holds the annular workpiece a to the chuck 44c. Attach part 1, then operate the actuator 45 again,
The horizontal beam 43 is lowered to a position where the annular workpiece a can be barrel-polished.

Of course, when descending this horizontal beam 43, the electric motor 44b may be driven to rotate the book holding device E while descending.

In the figure, 44d and 44e are pulleys, and 44f is pulley 44.
d, the belt attached between 44e, M is the barrel tank 3 mentioned above.
This is the media stored in 0.

As described above, in this invention, the attachment part for the annular workpiece is formed in a closed loop shape, and an opening for loading and unloading the workpiece is provided in the upper part, and this opening can be elastically opened and closed. The structure can be significantly simplified compared to the conventional holding device described above, and the number of moving parts and sliding parts can be reduced as much as possible, so the reliability of work holding can be greatly improved. .

Furthermore, this design allows the workpiece to move along the closed-loop attachment part during barrel polishing, which prevents unbalanced loading. Since it can be opened and closed at any time, the effects are extremely large, such as the ability to easily attach and detach workpieces.

[Brief explanation of drawings]

Figures 1 to 5 show an annular workpiece holding device according to an embodiment of this invention. Figure 1 is a front view explanatory view showing the first embodiment, and Figure 2 is an explanatory front view of the first embodiment. 3 is a front view explanatory diagram showing the second embodiment; FIG. 4 is a front view explanatory diagram showing the third embodiment; and FIG. 5 is a front view diagram showing the fourth embodiment. FIG. 6 is a partially sectional front view illustrating a barrel polishing device equipped with the annular workpiece holding device of this invention. 1...Mounting part, 2...Mounting part, 3...
...Opening, G...Barrel polishing device, a.
・・・・・・Circular work.

Claims (1)

[Scope of utility model registration request] It has an attachment part for the barrel polishing device at the upper part, and an attachment part for the annular workpiece is formed at the lower part, and the attachment part for the annular workpiece is formed in a closed loop shape, and an opening for attachment and detachment of the workpiece is provided at the upper part. An annular workpiece holding device configured such that the opening can be elastically opened and closed.